Can I programmatically change the report pagesize or display format?

I have developed a crystal report and ***-viewer.jsp. The crystal report is set to use A3 page size.

After deployed to the web application, it's keeping as A4 page size.

So my crystal report content is cut.

I have try to add this code:

crystalReportPageViewer.setBestFitPage(true);

crystalReportPageViewer.setPrintMode(CrPrintMode.fromString("PDF"));

However, it doesn't take any effect to fit the content to page correctly.

And it's not displaying as PDF mode. That is also strange.

It's still showing in page viewer.